I'll put it this way to get people thinking, say these cheapie coilover cost $1300
take away shipping and profit margins you get maybe a $1000 coilover? so thats $250 per corner
breakdown all the exterior stuff and how much that would probably cost
a really good spring cost about $100, but I seriously doubt these would be good springs, so say the springs cost $50
that leaves $200 for the actual shock, 
shiny anodized tops with spherical bearing say $75
anodized spring seats and locks $25
mounting brackets and machining a threaded shock body $25
so you're left with $75 per shock for "precision" engineered pistons, fluid, valves, & adjusters
in contrast a Koni Shock absorber for $250 what's spent on the exterior? simple non threaded steel shock body 
no spring or spring seats, or shiny tops, hell, you even have to insert it to your own mounting brackets!
wouldn't you prefer all that money be spent on the internals where it counts?
I know what I'd buy if I needed suspension on a budget.
and I get to proudly wear this sticker:
http://www.koni.com/typo3temp/pics/e4799e1f3a.jpg
PRICELESS!